Locomotive front-end-coupling gear.



N0. 695,29l. Patented Mar. ll, I902. J. F. DUNN.

LOCOMOTIVE FRONT END COUPLING GEAR. l (Application filed July 6, 1901.

(No Model.) 2 Sheets-Shaei I.

A TTOHNEYS "m: Nomgls PETERS no. Puoraumo, WASNINGTON. n. c.

No. 695,29l. Patented Mar. ll, I902.

J. F. DUNN.

LOGOMOTIVE FRONT END COUPLING GEAR.

(Application filed July 6, 1901.) (No Model.) 2 Sheets-Sheet 2.

WITNESSES: INVENTOH Mama) I By My ATTORNEYS n1: iiah'ms'vn'zns cov;momuma, WAsHINGTUN, n. c.

UNITED STATES PATENT FFICE.

JAMES F. DUNN, OF SALT LAKE CITY, UTAH.

LOCOMOTIVE FRONT-ENDJJOUPLING GEAR.

sPECIFICATION forming part of Letters Patent No. 695,291, dated March11, 1902.

Application filed July 6, 1901- Serial No. 67,265. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES F. DUNN, acitizen of the United States, and aresident of Salt Lake City, in the county of Salt Lake and State ofUtah, have invented a new and Improved Locomotive Front-End-CouplerGear, of which the following is a full, clear, and exact description.

This invention relates to an improvement on the invention covered by myprior patent for locomotive-pilot rigging, granted July 3, 1900, No.653,075.

The object of this invention is to provide efiective mechanism forautomatically looking the coupler in elevated position, so that theaccidental collapse of the coupler-supporting device and the consequentfalling of the coupler will not be possible.

This specification is a specific description of one form of theinvention, while the claims are definitions of the actual scope thereof.

Reference is to be had to the accompanying drawings, formingapart ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of the invention. Fig. 2 is a frontelevation thereof, with partslin section, on the line 2 2 of Fig. 1.Fig. 3 is a detail of the lock, showing it equipped for fluid-pressureoperation; and Fig. 4 is a diagram illustrating the manner of operatingby said fluid-pressure.

Referring to Figs. 1 and 2, a indicates the pilot, I) the front-endcoupler, c the togglelinks which sustain the coupler, and d thecompressed-air or other motive-fluid piston for actuating thetoggle-links, all of which form parts of the device as previouslypatented. The lower of the toggle links, as shown in Fig. 2, is formedin two parallel parts and has a transverse bridge 0' extending betweenits parts. This link is pivoted in lugs e, forming part of a plate 6.The parts of the links 0 are capable of straddling a stand f, mounted onthe plate 6. Within the stand fmoves vertically a bolt g, which ispressed upward by-a spring 9' and which is normally adapted to lie inthe position shown in Figs. 1 and 2-that is to say, in engagement withthe rear side of the bridge 0 of the lower toggle. The bridge 0' isbeveled (see dotted lines, Fig. 1) and the bolt g has the standf.

its working end similarly formed, so that as the toggle swings forwardit automatically looks with the bolt. The toggle-links swing backward tolower the coupler, and when the bolt 9 is engaged with the toggle-linksit is clear that they will be locked and that the breaking of the toggleand dropping of the coupler cannot be effected.

h indicates a seat which is formed on and preferably integral with theplate 6 in position to bear the weight of the coupler when it is throwndownward, all of which is indicated by dotted lines in Fig. 1.

I may provide two means for retracting the bolt 9 when it is desired tobreak the toggle and lower the couplerviz., ahand-operated device and afluid operated device. The hand-operated device (see Figs. 1 and 2)comprises a lever i, which is fulcrumed on a web 6 forming part of theplate 6. This lever is projected through an opening in the standf and isengaged with the bolt 9.

i indicates means in connection with the lever 2' for manually throwingthe lever, so as to move the bolt g downward and release the toggle.

In my previous patent I described an oscillating fluid-cylinderconnected with the toggle to actuate it. In Figs.3 and 4 of the drawingsthere is illustrated a piston 9 formed on the bolt g within thecylinder-like portion f of To this cylinder leads a pipe 7c from thesource of fluid-supply, the pipe entering above the piston g, so thatthe fluidpressure will throw the bolt 9 down. As the piston g moves tothe bottom of the cylinder f it opens to the pipe 7r: a pipe 7c incommunication with the cylinder f at the opposite side. This pipe leadsto a port d in the cylinder d, such port admitting the pressure to thefront side of the piston in the cylinder (Z. 70 indicates a pipe leadingfrom the opposite side of the piston d. Now it will be seen that theinstant fluid-pressure is admitted to the pipe 7r it will act on thebolt 9 and withdraw it, and it will subsequently act on the piston ofthe cylinder d and break the toggle to move the coupler d downward. Whenthe fiuid-pressure is relaxed, the spring g acts and returns the partsto active position. These operating devices as above described may beused either separately or independently.

Having thus described my invent-ion, I claim as new and desire to secureby Letters Patent 1. The combination of a relatively stationary support,a pivoted coupler mounted above the support, togglelinks bearing betweenthe support and coupler to raise and lower it, and a lock devicepressing a member movably into engagement with one of the togglelinks,to prevent the swinging thereof.

2. The combination of a pivoted coupler, means for raising and loweringit, a lock device comprising a bolt movable into engagement with a partof said means for raising and lowering the coupler, whereby to hold thesaid means in active position and devices for actuating the bolt.

3. The combination of a pivoted coupler, means for raising and loweringit, a lock device comprisinga stand and a reciprocal bolt therein, thebolt being movable into engagement with the said means for raising andlowering the said coupler whereby to hold said means in active position,and for actuating the bolt.

4. The combination of a pivoted coupler, means for raising and loweringit, a fluidpressnre motor for driving said means, a

means inactive, and means for leading the fluid-pressure first to thelock device and next to the said motor,t0 successively actuate them.

5. The combination of a pivoted coupler, means for raising and loweringit, a stand comprising a cylinder, a bolt in the stand and having apiston-like portion within the said cylinder of the stand, the boltacting to hold inactive the means for raising and lowering the coupler,and means for leading a motive fluid to andfromthe said cylinder ofthestand.

6. The combination of a pivoted coupler, means for raising and loweringit, a plate mounted below said means and to which said means arepivoted, a lock device carried by the plate to prevent the action of themeans for raising and lowering the coupler, and a seat mounted on theplate to sustain the coupler when lowered.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES F. DUNN.

Witnesses:

I. B. ()WENS, EVERARD B. MARSHALL.

